Add 28/30 and 20/40
28/30 + 20/40 is 43/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
28/30 = 28 × 4/30 × 4 = 112/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
20/40 = 20 × 3/40 × 3 = 60/120 - Add the two like fractions:
112/120 + 60/120 = 112 + 60/120 = 172/120 - 172/120 simplified gives 43/30
- So, 28/30 + 20/40 = 43/30
In mixed form: 113/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/30+20/40 28/60+20/40 28/30+20/80 84/30+20/40 28/30+60/40 28/90+20/40